Effectiveness of pramipexole, a dopamine agonist, on rapid eye movement sleep behavior disorder

The Tohoku Journal of Experimental Medicine
Taeko SasaiMasato Matsuura

Abstract

Rapid eye movement (REM) sleep behavior disorder (RBD) is parasomnia characterized by REM sleep without atonia (RWA) and elaborate motor activity in association with dream mentation. Periodic leg movement during sleep (PLMS) is observed in a large share of patients with RBD, suggesting a common pathology: dopaminergic dysfunction. This study was undertaken to evaluate the effectiveness and mechanism of action of pramipexole, a dopamine agonist, on RBD symptoms. Fifteen patients (57-75 years old) with RBD with a PLMS index of more than 15 events/h shown by nocturnal polysomnography were enrolled. Sleep variables, the score of severity for RBD symptoms, REM density, and PLM index were compared before and after one month or more of consecutive pramipexole treatment. Correlation analysis was conducted between the rate of change in RBD symptoms and the rate of reduction of REM density. Fourteen patients with RBD (80.0%) achieved symptomatic improvement of RBD with pramipexole treatment, which reduced REM density and PLM index during non-REM sleep despite the unchanged amount of RWA. The rate of change in RBD symptoms correlated positively with the rate of REM density reduction. Significant reduction of the PLM index was observed in ...Continue Reading

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